<template>
  <div>
    <!--面包屑导航区域 -->
    <el-breadcrumb separator="/">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>
    <!--卡片视图区域 -->
    <el-card>
      <!--警告区域 -->
      <el-alert
        :closable="false"
        title="添加商品信息"
        type="info"
        center
        show-icon>
      </el-alert>
      <!--步骤条区域 -->
      <el-steps :space="200" :active="activiteIndex-0" finish-status="success" align-center>
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>
      <!--Tab栏区域 -->
      <el-form label-position="top" :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px">
        <el-tabs @tab-click="tabClicked" :before-leave="beforeTabLeave" v-model="activiteIndex" :tab-position="'left'">
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input type="number" v-model="addForm.goods_price"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input type="number" v-model="addForm.goods_weight"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input type="number" v-model="addForm.goods_number"></el-input>
            </el-form-item>
            <el-form-item label="商品分类" prop="goods_cat">
              <el-cascader
                @change="handleChange"
                expand-trigger="hover"
                v-model="addForm.goods_cat"
                :options="cateList"
                :props="cateProps"></el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品参数" name="1">
            <el-form-item :label="item.attr_name" v-for="item in manyTabData" :key="item.attr_id">
              <!--复选框组 -->
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox border :key="i" v-for="(cb,i) in item.attr_vals" :label="cb"></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <el-form-item :label="item.attr_name" v-for="item in onlyTabData" :key="item.attr_id">
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <!--图片上传区域 -->
            <el-upload
              :on-success="handleSuccess"
              :headers="headerObj"
              :action="uploadURL"
              :on-preview="handlePreview"
              :on-remove="handleRemove"
              list-type="picture">
              <el-button size="small" type="primary">点击上传</el-button>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
            <!--富文本编辑区域 -->
            <quill-editor v-model="addForm.goods_introduce">
            </quill-editor>
            <!--添加商品按钮区域 -->
            <el-button type="primary" class="btnAdd" @click="add">添加商品</el-button>
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>
    <!--图片预览 -->
    <el-dialog
      title="图片预览"
      :visible.sync="previewVisiable"
      width="50%">
      <img :src="previewPath" alt="" class="previewImg">
    </el-dialog>
  </div>
</template>

<script>
import _ from 'lodash'

export default {
  created () {
    this.getCateList()
  },
  data: function () {
    return {
      // 默认激活的步骤
      activiteIndex: '0',
      // 表单数据
      addForm: {
        goods_name: '',
        goods_price: 0,
        goods_weight: 0,
        goods_number: 0,
        goods_cat: [],
        pics: [],
        attrs: []
      },
      // 表单验证规则对象
      addFormRules: {
        goods_name: [
          {
            required: true,
            message: '请输入商品名称',
            trigger: 'blur'
          }
        ],
        goods_price: [
          {
            required: true,
            message: '请输入商品价格',
            trigger: 'blur'
          }
        ],
        goods_weight: [
          {
            required: true,
            message: '请输入商品重量',
            trigger: 'blur'
          }
        ],
        goods_number: [
          {
            required: true,
            message: '请输入商品数量',
            trigger: 'blur'
          }
        ],
        goods_cat: [
          {
            required: true,
            message: '请输入商品数量',
            trigger: 'blur'
          }
        ]
      },
      // 商品分类的数据列表
      cateList: [],
      // 级联选择器的配置对象
      cateProps: {
        value: 'cat_id',
        label: 'cat_name',
        children: 'children'
      },
      // 动态参数列表数据
      manyTabData: [],
      // 动态参数列表数据
      onlyTabData: [],
      // 上传图片的URL地址
      uploadURL: 'http://127.0.0.1:8888/api/private/v1/upload',
      // 图片上传组件的请求头对象
      headerObj: {
        Authorization: window.sessionStorage.getItem('token')
      },
      // 预览图片的地址
      previewPath: '',
      // 控制图片预览对话框的显示与隐藏
      previewVisiable: false,
      // 商品详情
      goods_introduce: ''
    }
  },
  methods: {
    // 获得商品分类的数据列表
    getCateList: async function () {
      var { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200) return this.$message.error('获取数据失败！')
      this.cateList = res.data
    },
    // 级联选择器改变事件
    handleChange: function () {
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = []
        return
      }
      console.log(this.addForm.goods_cat)
    },
    // Tae页切换的事件
    beforeTabLeave: function (activeName, oldActiveName) {
      if (oldActiveName === '0' && this.addForm.goods_cat.length !== 3) {
        this.$message.error('请先选择商品分类！')
        return false
      }
      return true
    },
    // 监听Tab页点击事件
    tabClicked: async function () {
      // 证明选中的是商品参数面板
      if (this.activiteIndex === '1') {
        var { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, {
          params: { sel: 'many' }
        })
        if (res.meta.status !== 200) return this.$message.error('获取动态参数列表失败！')
        res.data.forEach(item => {
          item.attr_vals = item.attr_vals.length === 0 ? [] : item.attr_vals.split(' ')
        })
        this.manyTabData = res.data
      } else if (this.activiteIndex === '2') {
        var { data: res2 } = await this.$http.get(`categories/${this.cateId}/attributes`, {
          params: { sel: 'only' }
        })
        if (res2.meta.status !== 200) return this.$message.error('获取静态属性列表失败！')
        // res2.data.forEach(item => {
        //   item.attr_vals = item.attr_vals.length === 0 ? [] : item.attr_vals.split(' ')
        // })
        this.onlyTabData = res2.data
        console.log(this.onlyTabData)
      }
    },
    // 处理点击图片预览事件
    handlePreview: function (file) {
      this.previewPath = file.response.data.url
      this.previewVisiable = true
    },
    // 处理取消选择图片事件
    handleRemove: function (file) {
      var filePath = file.response.data.tmp_path
      var index = this.addForm.pics.findIndex(item => item.pic === filePath)
      this.addForm.pics.splice(index, 1)
      console.log(this.addForm)
    },
    // 图片上传成功时调用的函数
    handleSuccess: function (response) {
      var picInfo = { pic: response.data.tmp_path }
      this.addForm.pics.push(picInfo)
    },
    // 添加商品
    add: function () {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) return this.$message.error('请填写必要的表单项！')
        var form = _.cloneDeep(this.addForm)
        form.goods_cat = form.goods_cat.join(',')
        this.manyTabData.forEach(item => {
          var newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals.join(' ')
          }
          this.addForm.attrs.push(newInfo)
        })
        this.onlyTabData.forEach(item => {
          var newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals
          }
          this.addForm.attrs.push(newInfo)
        })
        form.attrs = this.addForm.attrs
        var { data: res } = await this.$http.post('goods', form)
        if (res.meta.status !== 201) return this.$message.error('添加商品失败！')
        this.$router.push('/goods')
        this.$message.success('添加商品成功！')
      })
    }
  },
  computed: {
    cateId: function () {
      if (this.addForm.goods_cat.length === 3) return this.addForm.goods_cat[2]
      return null
    }
  }
}
</script>

<style lang="less" scoped>
  .el-checkbox {
    margin: 0px 10px 0px 0px !important;
  }

  .previewImg {
    width: 100%;
  }

  .btnAdd {
    margin-top: 15px;
  }
</style>
